Buffer overflow in Gnu Glibc
CVE-2023-4911
A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables…
Vulnerability class: Buffer Overflow
EPSS: 0.699 (98.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Patch, Issue Tracking)
- secalert@redhat.com (Exploit, Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Exploit, Third Party Advisory, VDB Entry)
Frequently asked questions
- What is CVE-2023-4911?
- CVE-2023-4911 is a high-severity vulnerability in Gnu Glibc, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2023-10-03.
- How severe is CVE-2023-4911?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2023-4911 known to be exploited?
- Yes. CVE-2023-4911 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-11-21), indicating it is being actively exploited. 102 public proof-of-concept repositories are indexed.